# TrainerFlow vs Biostacks

The clearest difference is in-app purchases: TrainerFlow at none against Biostacks's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Biostacks sells 2 in-app purchases, starting at $3.99 per month. TrainerFlow asks for nothing beyond the download.

TrainerFlow ships an update every 11 days, Biostacks every 10 days. The most recent releases landed on September 29, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | TrainerFlow | Biostacks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/biostacks-supplement-tracker/id6763328808/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 10 days** |
| Monetization | — | Freemium |
| Size | 49 MB | 63 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [TrainerFlow LTD](https://appshunter.io/developer/1891990908) | [Hmujo LLC](https://appshunter.io/developer/1895266544) |

## What reviewers say

### TrainerFlow

[App page](https://appshunter.io/ios/app/trainerflow/id6761902688)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Biostacks

[App page](https://appshunter.io/ios/app/biostacks-supplement-tracker/id6763328808)

Easily manage your supplement intake with barcode scanning, AI assistance, and detailed insights. Track routines, monitor nutrient coverage, and analyze your stack's effectiveness and cost. Prioritizes user privacy with offline functionality and optional iCloud sync.

**Highlights:** Barcode scanning for supplement library, AI-powered supplement routine analysis, Customizable daily and cycle schedules, StackScore for routine quality, Potential interaction warnings, RDA coverage and nutrient overlap analysis, Mood, energy, and sleep trend tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Biostacks Pro - Monthly | $3.99 | per month |
| Biostacks Pro - Annual | $24.99 | per year |


## Frequently asked questions

### Is TrainerFlow free?

TrainerFlow is free to download, with no in-app purchases.

### Is Biostacks free?

Biostacks is free to download, with in-app purchases available.

### Do TrainerFlow or Biostacks have ads?

Neither TrainerFlow nor Biostacks shows ads.

### Which is updated more often, TrainerFlow or Biostacks?

TrainerFlow ships an update every 11 days, and Biostacks every 10 days. Most recently, TrainerFlow was updated on September 29, 2026 and Biostacks on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*